package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.sky.mapper.UserMapper;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserService userService;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;
    @Autowired
    private WebSocketServer webSocketServer;



    // 用户下单
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        log.info("用户下单:{}", ordersSubmitDTO);
        // 首选处理各种业务异常，包括验证地址是否存在、验证购物车数据是否存在，等等
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            // 如果地址不存在，抛出业务异常
            throw new IllegalArgumentException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        // 检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());
        // 获取当前用户ID
        Long userId = userService.getCurrentUserId(); // 确保此方法返回有效用户ID
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            // 如果购物车数据不存在，抛出业务异常
            throw new IllegalArgumentException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        // 设置订单状态
        orders.setStatus(Orders.PENDING_PAYMENT);
        // 设置订单号, 使用当前时间戳
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setUserId(userId);
        // 向订单表插入一条数据
        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        // 向订单明细表插入n条数据
        for(ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        // 清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        // 封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = userService.getCurrentUserId();
        User user = userService.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 通过webSocket推送消息给客户端
        Map map = new HashMap();
        map.put("type", 1); // 1表示新订单,2表示客户催单
        map.put("orderId", ordersDB.getId()); // 订单id
        map.put("content", "订单号：" + outTradeNo); // 订单号
        // 通过webSocketServer发送消息给客户端
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    @Override
    public PageResult pageQueryUser(int page, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(page, pageSize);
        // 封装查询条件
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(userService.getCurrentUserId());
        // 分页查询
        Page<Orders> pageInfo = orderMapper.pageQueryUser(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();
        // 遍历分页结果
        if (pageInfo != null && pageInfo.getTotal() > 0) {
            // 获取分页结果
            for(Orders orders : pageInfo) {
                Long orderId = orders.getId();
                // 根据订单id查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                // 封装VO
                OrderVO orderVO = new OrderVO();
                // 拷贝属性
                BeanUtils.copyProperties(orders, orderVO);
                // 设置订单明细
                orderVO.setOrderDetailList(orderDetails);
                // 封装到list集合
                list.add(orderVO);
            }
        }
        return new PageResult(pageInfo.getTotal(), list);
    }

    @Override
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 根据订单id查询订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 封装VO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    @Override
    public void cancelById(Long id) throws Exception {
        log.info("取消订单，订单id：{}", id);
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 判断订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 判断订单状态, 是否已完成
        if (orders.getStatus() > Orders.TO_BE_CONFIRMED) {
            // 订单状态为已完成，不能取消
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 订单状态正常，取消订单
        Orders orderLists = new Orders();
        orderLists.setId(orders.getId());

        log.info("订单状态正常，取消订单,{}", orders);
        // 订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.PENDING_PAYMENT)) {
            // 退款
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01), //退款金额，单位 元
                    new BigDecimal(0.01) //原订单金额
            );
            // 设置订单状态为已取消
            orderLists.setPayStatus(Orders.REFUND);
        }
        // 设置订单状态为已取消
        orderLists.setStatus(Orders.CANCELLED);
        orderLists.setCancelReason("用户取消");
        orderLists.setCancelTime(LocalDateTime.now());
        orderMapper.update(orderLists);
    }

    // 再来一单
    @Override
    public void repetition(Long id) {
        // 根据id查询订单
        Long userId = userService.getCurrentUserId();
        Orders orders = orderMapper.getById(id);
        // 根据订单id查询订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将订单对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        log.info("购物车数据：{}", shoppingCartList);
        // 批量插入购物车数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> pageInfo = orderMapper.pageQueryUser(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(pageInfo);
        return new PageResult(pageInfo.getTotal(), orderVOList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .deliveryStatus(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 获取支付状态
        Integer payStatus = orders.getPayStatus();
        if (payStatus.equals(Orders.PAID)) {
            // 退款
            String refund = weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01), //退款金额，单位 元
                    new BigDecimal(0.01) //原订单金额
            );
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orderNew = new Orders();
        orderNew.setId(orders.getId());
        orderNew.setStatus(Orders.CANCELLED);
        orderNew.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orderNew.setCancelTime(LocalDateTime.now());
        orderMapper.update(orderNew);
    }

    // 派送订单
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orderNew = new Orders();
        orderNew.setId(orders.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orderNew);
    }

    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为4
        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orderNew = new Orders();
        orderNew.setId(orders.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        log.info("订单状态：{}", orders);
        orderMapper.update(orderNew);
    }


    // 订单催单
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2); // 2表示短信类型，用户催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    private List<OrderVO> getOrderVOList(Page<Orders> pageInfo) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = pageInfo.getResult();
        for (Orders orders : ordersList) {
            // 将共同字段复制到OrderVO
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            // 获取订单菜品信息
            String orderDishes = getOrderDishesStr(orders);
            // 将订单菜品信息封装到orderVO中，并添加到orderVOList
            orderVO.setOrderDishes(orderDishes);
            orderVOList.add(orderVO);
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);
        // 获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);
        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }
        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
